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                          MASSACHUSETTS INVESTORS TRUST

                      Supplement to the Current Prospectus


         During the period from July 15, 1997  through  October 17, 1997 (unless
extended by MFS Fund Distributors,  Inc. ("MFD")) (the "Sales Period"), MFD will
pay SunAmerica Securities,  Inc. 100% of the applicable sales charge on sales of
Class A shares of the Fund sold by it during the Sales Period. In addition,  MFD
will pay SunAmerica Securities,  Inc. an additional commission equal to 0.50% of
the net  asset  value of all of the Class B shares of the Fund sold by it during
the Sales Period.


                 The date of this Supplement is July 15, 1997.



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